文档介绍：四川冕宁某金多金属矿地质特征及找矿标志
四川冕宁某金多金属矿地质特征及找矿标志
摘要:阐述了某金多金属矿所处的区域地质背景和矿点地质特征。矿床位于松潘—甘孜造山带南东缘(Ⅰ级)、锦屏山前陆推覆造山带北东段(Ⅱ级),夹持于区域性锦屏逆冲断裂与金河逆冲断裂之间,矿体产于黄(褐)铁矿化蚀变岩带中,并受层间破碎带控制,成矿特征与区域上甘孜~理塘断裂带的破碎带蚀变岩型金矿类同,因此初步确定矿床成因类型为基性火山~沉积变质热液型金矿床。
关键词:金多金属矿;地质特征;成因类型;找矿标志
Abstract: elaborated a gold polymetallic regional geological background and geological features of mines. Ore deposit is located in songpan ganzi - orogenic belt south east edge (Ⅰ level), kam pingshan north eastern foreland nappe orogenic belts (Ⅱ class), clamping in regional kam screen thrust fault and the mass between the thrust faults, orebody originated from yellow iron ore mineralization alteration rock belt (brown), and controlled by interlayer fracture zone, mineralization features and regional ~ in garze litang fracture zone of fracture zone altered rock type gold deposits similar, therefore the primary ore deposit origin types as basic volcanic ~ sedimentary metamorphic hydrothermal type gold deposits.
Key words: gold polymetallic deposits; Geological characteristics; ic types; Prospecting marks
中图分类号::A文章编号:2095-2104(2013)
1区域成矿地质背景
四川冕宁某金多金属矿位于松潘—甘孜造山带南东缘(Ⅰ级)、锦屏山前陆推覆造山带北东段(Ⅱ级),夹持于区域性锦屏逆冲断裂与金河逆冲断裂之间,位于一燕山期黑云母花岗岩体西侧[1]。
地层
区域出露地层主要为:二迭系下统灰岩、变砂岩、板岩,二迭系上统下段玄武岩夹灰岩、板岩;三迭系中统盐塘组下段绿片岩、变砂岩夹玄武岩、大理岩等。
构造
区域构造以断裂为主,具多期性和继承性,主要为北北东向和近南北向断裂,另有北东向、北西向次级断裂。
岩浆岩
除地层中的变基性火山岩外,有燕山期花岗岩体(γβ52)侵入,花岗岩